Mr. T. D. A. Cockerell's Notes on Slugs. 381 



with altogether fictitious rug£e on the back. Ferussac's figure 

 is after one of those in Journ. de Phys., and is fairly recog- 

 nizable. 



Altogether I think it must be held that Blainville described 

 and figured his genus Limacella sufficiently for recognition, 

 and as it antedates Philomycus by three years, the name must 

 be used. Limacella, Brard, 1815, need not be considered, as 

 it is identical with Limax, Linne, 1767. The synonymy of 

 Limacelhij Bl., will accordingly stand : — 



Limacella, Blainville. 



l.-^l?. Limacella, Blainville, " M^in. siir quelq. Moll. Piilm." Joui-n. de 

 Phys. Dee. 1817, p. 443 (text), and Nov. 1817, figs. 4, 5. 



1820. Philomi/cus, Rafinesque, Ann. of Nat. p. 10. 

 1^20. Eumelus, Rafinesque, Ann. of Nat. p. 10. 



1824. Megliimatium, v. llass. Bull. Univ. Sci. iii. p. 82. 

 1842. Incilana, Bens. Ann. & Mag. Nat. Hist. ix. p. 486. 



1842. Tebemiophorus, Biuney, Bost. Journ. Nat. Hist. iv. p. 171. 

 1864. Pnllifem, Movse, Journ. Portl. Soc. i. 8, fig. 5, pi. iii. fig. 6. 



It does not seem necessary to recognize more than one genus 

 here, though v. Ihering (Nachr. d. m. Ges. 1889) recognizes 

 three — Philomycus^ Pallifera, and Meyhimatium. Pallifera 

 may be conveniently retained as a subgenus. 



The species of Limacella are as follows : — 



Limacella lactiformisj Blainv. 



1817. Limacella lactiformis, Blainv. Journ. de Phys. Dec. p. 444. 



1821. Limacellus lacfescens, Ferussac, Hist. Nat. Moll. pi. vii. fig. 1. 



1825. Limacella elfortiana, Blainv. Man. de Mai, et de Conch, p. 464. 



This appears to be distinct from any species since recog- 

 nized. The British Museum types may be briefly described 

 as follows: — 42 millim. long; respiratory orifice 7 millim. 

 from anterior border of mantle. Sole, lat, 7 millim. Entirely 

 greyish white ; mantle pellucid, semitransparent, finely 

 granulose. Sole slightly ochreous, unicolorous. A distinct 

 groove round the edge of the foot. Liver pale chocolate. 



Gray in 1855 (Cat. Pulm. p. 158) has referred this species 

 to Philomycus. 



Limacella carol inens is (Bosc). 



Limax carolinensis, Fer. Hist. 77, pi. vi. fig. 3. 



There are two specimens of this species in the British 

 Museum from Virginia {Dr. J. T'F?/ma«), agreeing excellentlv 



